Improvement in saw-sets



'Iren STATES f1: rtree.

HERRMANN HEINICKE, OF NEWARK, NEW JERSEY, ASSIGNOR TO E. W.

j ROFF, OF SAME PLAGE.

IMPROVEMENT IN SAW-SETS.

Specification forming part of Letters Patent No. 159,4l3, dated February 2, 1875; application lile July 22, 1874.

To all whom it may concemb v Beit known that I, HERRMANN HEINICKE, of Newark, in the'county of Essex and State of New Jersey, have invented certain new and useful Improvements in Saw-Sets; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings making a part of this application.

My invention has for its object to provide a saw-set which shall automatically and alternately upset the teeth and feed the blade;

and to these ends my invention consists of a suitable bed provided with horizontal lateral and vertical supports for retaining the sawblade, and with spring-dies vand feeding mechanism, the spring-dies and mechanism being operated and controlled by the movements of a suitable lever, as will be hereinafter more fully set forth.

To enable those skilled in the art to more fully understand the same, I will describe the construction and operation of my improved saw-set, referring, by letters, to the accompanyin g drawings, in which- Figure l is an end view, particularly in section, and Fig. 2 is a top view.

Similar letters indicate like parts in both figures.

A represents a suitable bed plate or block, on which is formed or mounted the guide and die block B that receives two dies, a a, which are in cross-section, dovetail in form, and itting in correspondingly-shaped grooves in the block B. Gis a spring adapted to force apart the two dies a a, and D D are setscrews adapted to adjust the saw-blade vertically. E is a post, arranged in line with the slot or way between the die-block, against which the end of a spring, F, rests, and between which and the end of the spring F the saw-blade is held against any vibration. Mounted on the top of the guide-postE is another flat spring, G, which is adapted to rest lightly at its end upon the toothed edge of the saw-blade, and thus hold it in proper horizontal position and againstthe set-screws D D. The bed-plate B is cut away at one end, as shown, to form a suitable bearing for a swinging lever, H, which is pivoted thereto. This lever H has two horns or arms, I I, of such shape and length as to alternately strike the projecting ends of the dies a a and force them against the end of the teeth of the saw. Near the rear end of this lever H is pivoted, in a horizontal slot, a pitman, J, which extends, and is pivoted at its other end, to a vibrating vertical arin, K, mounted upon the plate A, as clearly shown. In the upper end of this vibrating arm K is a vertical slot, b, wherein is pivoted the rear end of a spring or gravitypawl, L, which may be adjusted within the slot b, as clearly seen. The pawl L has its free end slightly bent downward, and adaptedto press upon the teeth of the saw-blade M, which is being operated upon. The slot through the guide-block B is slightly tapered off at the-top in an obvious manner to permit of the spreading of the teeth of the saw when struck by the punches or dies a a.

The operation of my improved device is as follows: The saw-blade being properly adj usted in position, and the pawl L being engaged with the teeth, the lever H is vibrated, which causes the horns I and Il to alternately strike the projecting ends of the dies a a, which are forced out when not at work by the spring C, and, forcing them against the teeth of the saw, upset or spread them in alternate directions. The saine movement necessary to operate the dies, as just de tscribed, also, through the medium of the pitmaii J and rocking arm K, causes the pawl L to advance and recede, the advance feeding the blade of the saw just the proper distance to present the teeth in regular succession to the action of the dies a a.. It will be observed that, by the adjustable connection of the pitman J with the lever H, and the adjustable connection of the pawl L with the rocking arm K, the speed and distance of feed at each stroke of the lever may be regulated to such a degree that the movement of the saw-blade, at the time the horn I projects the die a against the tooth, is so slight as not to interfere with the proper setting of the tooth. The saw-blade is at perfect restwhile the horn Il operates upon the other die, a.

In the drawing I have shown all the connections of parts as made by screws, as I find pawl L for producing the feed, substantially as described.

3. The combination and arrangement, with the guide-block B and bed A, of the set-screws D D, post E, and springs G F, for holding the blade in the proper position while being operated upon, as set forth.

Witness my hand and seal.

HERRMANN HEINIGKE. In presence of- J AMES EDWIN GARABRANT,

WM. H. NICHOLS. 

